ServerNet Cluster 6780 Planning and Installation Guide (G06.24+, H06.03+)

Glossary
ServerNet Cluster 6780 Planning and Installation Guide—527301-004
Glossary-22
ServerNet
messages to the clients or requesters. A server process is a running instance of a
server program.
ServerNet. A communications protocol developed by HP. See also ServerNet I and
ServerNet II.
ServerNet I. A communications protocol that features 50 megabytes/second speed, 6-port
ServerNet routers, 8b/9b encoding, and a 64-byte maximum packet size. See also
ServerNet II.
ServerNet II. A communications protocol that features 125 (or 50) megabytes/second
speed, 12-port ServerNet routers, 8b/9b and 8b/10b (serializer ready) encoding, and a
512-byte maximum packet size. ServerNet II architecture is backward-compatible with
ServerNet I architecture. See also ServerNet I.
ServerNet adapter. A hardware component that connects a system to peripheral devices
using a ServerNet bus interface (SBI). A ServerNet adapter is similar in function to an
I/O controller logic board (LB) and backplane interconnect card (BIC) in NonStop
K-series servers.
ServerNet address. A virtual memory address that, when translated to a physical address,
indicates where the memory access needed by a ServerNet transaction begins. In
some cases, the translation can point to some entity other than memory, such as a
register. The ServerNet address is included in all ServerNet read request and write
request packets.
ServerNet addressable controller (SAC). An I/O controller that is uniquely addressable by
a ServerNet ID in the ServerNet fabrics. A SAC is typically implemented on some
portion of a processor multifunction (PMF) customer-replaceable unit (CRU), an I/O
multifunction (IOMF) CRU, or a ServerNet adapter.
ServerNet cluster. A network of servers connected together using the ServerNet protocol,
and sharing a common transport protocol for interprocessor communication across and
within a cluster. A ServerNet cluster offers fast end-to-end communication without
intermediate protocol stacks, achieving comparable speeds for internal and external
ServerNet communication. See also cluster.
ServerNet Cluster. The abbreviated product name for the collection of hardware and
software components that constitute a ServerNet cluster.
ServerNet cluster monitor process (SNETMON). A process pair named $ZZSCL that
manages the state of the ServerNet cluster subsystem. Each node (system) in a
ServerNet cluster must have one SNETMON process pair running. See also ServerNet
cluster subsystem.